MATLAB: How can i solve part 2 … should i convert the statespace to tf

MATLAB

close all;
clear all;
clc;
m1=1;
m2=3;
k1=10;
k2=2;
b=0.5;
A=[0 1 0 0;-(k1+k2)/m1 -b/m1 k2/m1 b/m1;0 0 0 1; k2/m2 b/m2 -k2/m2 -b/m2];
B=[0;0;0;1/m2];
C=[1 0 0 0;0 0 1 0];
D=[0;0];
sys_ss=ss(A,B,C,D);
step(sys_ss);
[num,den]=ss2tf(A,B,C,D);

Best Answer

Actually you do not need to do that since they will eventually give the same result but since the question wants you to do it, write the following code:
Gs(1)=tf(num(1,:),den);
Gs(2)=tf(num(2,:),den)
step(Gs)
and you will see that you get identical results.
Related Question